3233082 - K21 FUEL RESERVE WARNING LIGHT NOT WORKING

With the ignition key in the ON position, the fuel reserve warning light does not come on when the tank is empty or comes on when the tank is full.
Results of the tests
0PRELIMINARY CHECKSAll OKProblems metOperation
Check the operation of the fuel level gauge. Continue to Step 1 The fuel level gauge does not work either See table   K20 
1CHECKING WARNING LIGHTAll OKProblems metOperation
Check the condition of the fuel reserve warning light, located in the central instrument Continue to Step 2 Warning light faulty Replace the central instrument warning light Op.   5560C51 
2CHECKING CENTRAL INSTRUMENTAll OKProblems metOperation
Check the central instrument is working properly, particularly the fuel level signal check device see DESCRIPTION AND OPERATION: 5560 INSTRUMENT PANEL Continue to Step 3 Device not working Change the central instrument Op.   5560C51 
3CHECK CORRECT OPERATIONAll OKProblems metOperation
Check that the fault is no longer presentEnd of diagnosisFault persistsSearch for the fault starting from another symptom'